Difference between revisions of "Memory Management"
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* Both types of area are represented by the abstract javax.realtime.MemoryArea class. | * Both types of area are represented by the abstract javax.realtime.MemoryArea class. | ||
* Only javax.realtime.Schedulable objects are allowed to enter into a MemoryArea. If standard Java threads attempt to get in then an IllegalThreadStateException is thrown. | * Only javax.realtime.Schedulable objects are allowed to enter into a MemoryArea. If standard Java threads attempt to get in then an IllegalThreadStateException is thrown. | ||
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| + | == Immortal Memory == | ||
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| + | * The memory associated with objects allocated in immortal memory is '''never GC'ed''' and '''never released''' during the lifetime of the application. | ||
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[[Category:RealTimeJava]] | [[Category:RealTimeJava]] | ||
Revision as of 17:07, 1 December 2011
Intro
- Running garbage collection can have an impact on the response time of a time critical thread.
- It is necessary to have memory that is not subject to GC.
- Provides two alternatives to traditional Java heap memory:
- Immortal Memory
- Scoped Memory
- Both types of area are represented by the abstract javax.realtime.MemoryArea class.
- Only javax.realtime.Schedulable objects are allowed to enter into a MemoryArea. If standard Java threads attempt to get in then an IllegalThreadStateException is thrown.
Immortal Memory
- The memory associated with objects allocated in immortal memory is never GC'ed and never released during the lifetime of the application.
